Google App Engine What is it? Cloud Service with a difference Rather than just give you a blank machine to work Google hosts the app directly, provides environment, data layer, scaling, service APIs All you worry about is your application logic and its presentation A Bit Like Maven Like Maven Google have made a lot of decisions about how to structure things Mightn't be exactly the way you would have done it but it takes the burden of those decisions away From my meagre experience (both in building apps and google app engine) they haven't done anything drastically annoying Some Details 5 millions clicks for free python 2.6 with some restrictions api for google users, images, datastore, mail, others... you get to use google's infrastructure, ever notice a significant page load on a google search Development Env Pydev, Eclipse Plugin, missing features, active community Google SDK, full mocked out server env. Command-Line tool to upload your project directly SDK recompiles code automatically never a need for a server reload, very fast feedback cycle gaeUnit, unit testing framework, launching from browser, couldn't get it to run personally Datastore Object Oriented Design, no need for a mapping xml file or annotations define a entity class with properties call put on this object to store it call fetch on this object with GQL to filter Scales as impressively as page loading Expando objects, dynamic properties, each instance can have different properties Some Drawbacks Currently only supports a subset of python 2.6 Doesn't support a lot of system calls, can't sniff what hardware you're running on Doesn't support the any python library that has compiled c code which is most of them If you're lucky enough to get 5 million clicks a month it can be a bit flaky in how it cuts you off A web request can only take around 8 seconds Patriot Act 1 and 2 High cost to migration On the other hand On October 18th in a Google Conference java support announced but no official word since. 5 million clicks for free, looks like each million after will be $40 a month. Some effort to make useful python libraries gae friendly When running out of quotas, exception thrown which you can catch to explain to user what’s happened Has been hinted 8-10 second limit will be extended when billing comes around What google app engine offers Great dashboard system, similar to google analytics Good local dev environment and upload tools Google probably handle more web requests than any other single organization, if you can't hit google its probably a problem with your dns Google takes on the burden of deployment, scaling and security. Unlike Amazon's service which gives you a blank machine where you're left with all those decisions Not a silver buffet In my humble opinion, its really only good for small quick applications that don't need to do anything out of the ordinary. Its not good if your application will need to: Think about anything for longer than 10 seconds Need to use fancy 3rd party libraries contain sensitive data Topicvote Simple app I made to play with google app engine http://topicvote.appspot.com allows people to add topics and vote for them Someone really likes eliminating waste spent about a week learning the basics of python Topicvote 2 From when I downloaded the sdk I had an basic app written and deployed in 4 hours another 4 hours to flesh it out This is particularly impressive if you knew of my track record on deployment stories Can you think of any other tech stack were you take a complete newbie, give them the sdk and they'll have something ready for heavy load in 4 hours? That last awkward slide Questions, Discussion, look at the code?